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460 lines
26 KiB
460 lines
26 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/tools/qdatetime.cpp:201 -->
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQDate Class Reference</h1>
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<p>The TQDate class provides date functions.
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<a href="#details">More...</a>
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<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when TQt is built with thread support.</p>
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<p><tt>#include <<a href="qdatetime-h.html">ntqdatetime.h</a>></tt>
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<p><a href="qdate-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQDate"><b>TQDate</b></a> ()</li>
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<li class=fn><a href="#TQDate-2"><b>TQDate</b></a> ( int y, int m, int d )</li>
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<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
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<li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li>
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<li class=fn>int <a href="#year"><b>year</b></a> () const</li>
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<li class=fn>int <a href="#month"><b>month</b></a> () const</li>
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<li class=fn>int <a href="#day"><b>day</b></a> () const</li>
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<li class=fn>int <a href="#dayOfWeek"><b>dayOfWeek</b></a> () const</li>
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<li class=fn>int <a href="#dayOfYear"><b>dayOfYear</b></a> () const</li>
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<li class=fn>int <a href="#daysInMonth"><b>daysInMonth</b></a> () const</li>
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<li class=fn>int <a href="#daysInYear"><b>daysInYear</b></a> () const</li>
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<li class=fn>int <a href="#weekNumber"><b>weekNumber</b></a> ( int * yearNumber = 0 ) const</li>
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<li class=fn>TQString <a href="#toString-2"><b>toString</b></a> ( TQt::DateFormat f = TQt::TextDate ) const</li>
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<li class=fn>TQString <a href="#toString"><b>toString</b></a> ( const TQString & format ) const</li>
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<li class=fn>bool <a href="#setYMD"><b>setYMD</b></a> ( int y, int m, int d )</li>
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<li class=fn>TQDate <a href="#addDays"><b>addDays</b></a> ( int ndays ) const</li>
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<li class=fn>TQDate <a href="#addMonths"><b>addMonths</b></a> ( int nmonths ) const</li>
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<li class=fn>TQDate <a href="#addYears"><b>addYears</b></a> ( int nyears ) const</li>
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<li class=fn>int <a href="#daysTo"><b>daysTo</b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator-lt"><b>operator<</b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator-lt-eq"><b>operator<=</b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator-gt"><b>operator></b></a> ( const TQDate & d ) const</li>
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<li class=fn>bool <a href="#operator-gt-eq"><b>operator>=</b></a> ( const TQDate & d ) const</li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>TQString monthName ( int month ) <em>(obsolete)</em></li>
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<li class=fn>TQString dayName ( int weekday ) <em>(obsolete)</em></li>
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<li class=fn>TQString <a href="#shortMonthName"><b>shortMonthName</b></a> ( int month )</li>
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<li class=fn>TQString <a href="#shortDayName"><b>shortDayName</b></a> ( int weekday )</li>
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<li class=fn>TQString <a href="#longMonthName"><b>longMonthName</b></a> ( int month )</li>
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<li class=fn>TQString <a href="#longDayName"><b>longDayName</b></a> ( int weekday )</li>
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<li class=fn>TQDate <a href="#currentDate-2"><b>currentDate</b></a> ()</li>
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<li class=fn>TQDate <a href="#currentDate"><b>currentDate</b></a> ( TQt::TimeSpec ts )</li>
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<li class=fn>TQDate <a href="#fromString"><b>fromString</b></a> ( const TQString & s, TQt::DateFormat f = TQt::TextDate )</li>
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<li class=fn>bool <a href="#isValid-2"><b>isValid</b></a> ( int y, int m, int d )</li>
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<li class=fn>bool <a href="#leapYear"><b>leapYear</b></a> ( int y )</li>
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</ul>
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<h2>Related Functions</h2>
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<ul>
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<li class=fn>TQDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( TQDataStream & s, const TQDate & d )</li>
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<li class=fn>TQDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( TQDataStream & s, TQDate & d )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQDate class provides date functions.
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<p>
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<p> A TQDate object contains a calendar date, i.e. year, month, and day
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numbers, in the modern Western (Gregorian) calendar. It can read
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the current date from the system clock. It provides functions for
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comparing dates and for manipulating dates, e.g. by adding a
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number of days or months or years.
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<p> A TQDate object is typically created either by giving the year,
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month and day numbers explicitly, or by using the static function
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<a href="#currentDate">currentDate</a>(), which creates a TQDate object containing the system
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clock's date. An explicit date can also be set using <a href="#setYMD">setYMD</a>(). The
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<a href="#fromString">fromString</a>() function returns a TQDate given a string and a date
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format which is used to interpret the date within the string.
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<p> The <a href="#year">year</a>(), <a href="#month">month</a>(), and <a href="#day">day</a>() functions provide access to the
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year, month, and day numbers. Also, <a href="#dayOfWeek">dayOfWeek</a>() and <a href="#dayOfYear">dayOfYear</a>()
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functions are provided. The same information is provided in
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textual format by the <a href="#toString">toString</a>(), <a href="#shortDayName">shortDayName</a>(), <a href="#longDayName">longDayName</a>(),
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<a href="#shortMonthName">shortMonthName</a>() and <a href="#longMonthName">longMonthName</a>() functions.
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<p> TQDate provides a full set of operators to compare two TQDate
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objects where smaller means earlier and larger means later.
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<p> You can increment (or decrement) a date by a given number of days
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using <a href="#addDays">addDays</a>(). Similarly you can use <a href="#addMonths">addMonths</a>() and <a href="#addYears">addYears</a>().
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The <a href="#daysTo">daysTo</a>() function returns the number of days between two
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dates.
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<p> The <a href="#daysInMonth">daysInMonth</a>() and <a href="#daysInYear">daysInYear</a>() functions return how many days
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there are in this date's month and year, respectively. The
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<a href="#leapYear">leapYear</a>() function indicates whether this date is in a leap year.
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<p> Note that TQDate should not be used for date calculations for dates
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prior to the introduction of the Gregorian calendar. This calendar
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was adopted by England from the 14<sup><small>th</small></sup>
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September 1752 (hence this is the earliest valid TQDate), and
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subsequently by most other Western countries, until 1923.
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<p> The end of time is reached around the year 8000, by which time we
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expect TQt to be obsolete.
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<p> <p>See also <a href="qtime.html">TQTime</a>, <a href="ntqdatetime.html">TQDateTime</a>, <a href="qdateedit.html">TQDateEdit</a>, <a href="ntqdatetimeedit.html">TQDateTimeEdit</a>, and <a href="time.html">Time and Date</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQDate"></a>TQDate::TQDate ()
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</h3>
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<p> Constructs a null date. Null dates are invalid.
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<p> <p>See also <a href="#isNull">isNull</a>() and <a href="#isValid">isValid</a>().
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<h3 class=fn><a name="TQDate-2"></a>TQDate::TQDate ( int y, int m, int d )
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</h3>
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Constructs a date with year <em>y</em>, month <em>m</em> and day <em>d</em>.
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<p> <em>y</em> must be in the range 1752..8000, <em>m</em> must be in the range
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1..12, and <em>d</em> must be in the range 1..31.
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<p> <b>Warning:</b> If <em>y</em> is in the range 0..99, it is interpreted as
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1900..1999.
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<p> <p>See also <a href="#isValid">isValid</a>().
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="addDays"></a>TQDate::addDays ( int ndays ) const
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</h3>
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Returns a TQDate object containing a date <em>ndays</em> later than the
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date of this object (or earlier if <em>ndays</em> is negative).
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<p> <p>See also <a href="#addMonths">addMonths</a>(), <a href="#addYears">addYears</a>(), and <a href="#daysTo">daysTo</a>().
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="addMonths"></a>TQDate::addMonths ( int nmonths ) const
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</h3>
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Returns a TQDate object containing a date <em>nmonths</em> later than the
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date of this object (or earlier if <em>nmonths</em> is negative).
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<p> <p>See also <a href="#addDays">addDays</a>() and <a href="#addYears">addYears</a>().
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="addYears"></a>TQDate::addYears ( int nyears ) const
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</h3>
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Returns a TQDate object containing a date <em>nyears</em> later than the
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date of this object (or earlier if <em>nyears</em> is negative).
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<p> <p>See also <a href="#addDays">addDays</a>() and <a href="#addMonths">addMonths</a>().
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="currentDate"></a>TQDate::currentDate ( <a href="ntqt.html#TimeSpec-enum">TQt::TimeSpec</a> ts )<tt> [static]</tt>
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</h3>
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Returns the current date, as reported by the system clock, for the
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TimeSpec <em>ts</em>. The default TimeSpec is LocalTime.
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<p> <p>See also <a href="qtime.html#currentTime">TQTime::currentTime</a>(), <a href="ntqdatetime.html#currentDateTime">TQDateTime::currentDateTime</a>(), and <a href="ntqt.html#TimeSpec-enum">TQt::TimeSpec</a>.
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<p>Example: <a href="dclock-example.html#x1098">dclock/dclock.cpp</a>.
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="currentDate-2"></a>TQDate::currentDate ()<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns the current date, as reported by the system clock.
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<p> <p>See also <a href="qtime.html#currentTime">TQTime::currentTime</a>() and <a href="ntqdatetime.html#currentDateTime">TQDateTime::currentDateTime</a>().
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<h3 class=fn>int <a name="day"></a>TQDate::day () const
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</h3>
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Returns the day of the month (1..31) of this date.
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<p> <p>See also <a href="#year">year</a>(), <a href="#month">month</a>(), and <a href="#dayOfWeek">dayOfWeek</a>().
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<p>Example: <a href="dclock-example.html#x1099">dclock/dclock.cpp</a>.
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<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="dayName"></a>TQDate::dayName ( int weekday )<tt> [static]</tt>
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> Use <a href="#shortDayName">shortDayName</a>() instead.
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<h3 class=fn>int <a name="dayOfWeek"></a>TQDate::dayOfWeek () const
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</h3>
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Returns the weekday (Monday=1..Sunday=7) for this date.
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<p> <p>See also <a href="#day">day</a>() and <a href="#dayOfYear">dayOfYear</a>().
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<h3 class=fn>int <a name="dayOfYear"></a>TQDate::dayOfYear () const
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</h3>
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Returns the day of the year (1..365) for this date.
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<p> <p>See also <a href="#day">day</a>() and <a href="#dayOfWeek">dayOfWeek</a>().
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<h3 class=fn>int <a name="daysInMonth"></a>TQDate::daysInMonth () const
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</h3>
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Returns the number of days in the month (28..31) for this date.
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<p> <p>See also <a href="#day">day</a>() and <a href="#daysInYear">daysInYear</a>().
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<h3 class=fn>int <a name="daysInYear"></a>TQDate::daysInYear () const
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</h3>
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Returns the number of days in the year (365 or 366) for this date.
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<p> <p>See also <a href="#day">day</a>() and <a href="#daysInMonth">daysInMonth</a>().
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<h3 class=fn>int <a name="daysTo"></a>TQDate::daysTo ( const <a href="qdate.html">TQDate</a> & d ) const
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</h3>
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Returns the number of days from this date to <em>d</em> (which is
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negative if <em>d</em> is earlier than this date).
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<p> Example:
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<pre>
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TQDate d1( 1995, 5, 17 ); // May 17th 1995
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TQDate d2( 1995, 5, 20 ); // May 20th 1995
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d1.<a href="#daysTo">daysTo</a>( d2 ); // returns 3
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d2.<a href="#daysTo">daysTo</a>( d1 ); // returns -3
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</pre>
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<p> <p>See also <a href="#addDays">addDays</a>().
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<h3 class=fn><a href="qdate.html">TQDate</a> <a name="fromString"></a>TQDate::fromString ( const <a href="ntqstring.html">TQString</a> & s, <a href="ntqt.html#DateFormat-enum">TQt::DateFormat</a> f = TQt::TextDate )<tt> [static]</tt>
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</h3>
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Returns the TQDate represented by the string <em>s</em>, using the format
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<em>f</em>, or an invalid date if the string cannot be parsed.
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<p> Note for <a href="ntqt.html#DateFormat-enum">TQt::TextDate</a>: It is recommended that you use the
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English short month names (e.g. "Jan"). Although localized month
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names can also be used, they depend on the user's locale settings.
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<p> <b>Warning:</b> <a href="ntqt.html#DateFormat-enum">TQt::LocalDate</a> cannot be used here.
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<h3 class=fn>bool <a name="isNull"></a>TQDate::isNull () const
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</h3>
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<p> Returns TRUE if the date is null; otherwise returns FALSE. A null
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date is invalid.
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<p> <p>See also <a href="#isValid">isValid</a>().
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<h3 class=fn>bool <a name="isValid"></a>TQDate::isValid () const
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</h3>
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Returns TRUE if this date is valid; otherwise returns FALSE.
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<p> <p>See also <a href="#isNull">isNull</a>().
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<h3 class=fn>bool <a name="isValid-2"></a>TQDate::isValid ( int y, int m, int d )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns TRUE if the specified date (year <em>y</em>, month <em>m</em> and day
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<em>d</em>) is valid; otherwise returns FALSE.
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<p> Example:
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<pre>
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TQDate::<a href="#isValid">isValid</a>( 2002, 5, 17 ); // TRUE May 17th 2002 is valid
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TQDate::<a href="#isValid">isValid</a>( 2002, 2, 30 ); // FALSE Feb 30th does not exist
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TQDate::<a href="#isValid">isValid</a>( 2004, 2, 29 ); // TRUE 2004 is a leap year
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TQDate::<a href="#isValid">isValid</a>( 1202, 6, 6 ); // FALSE 1202 is pre-Gregorian
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</pre>
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<p> <b>Warning:</b> A <em>y</em> value in the range 00..99 is interpreted as
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1900..1999.
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<p> <p>See also <a href="#isNull">isNull</a>() and <a href="#setYMD">setYMD</a>().
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<h3 class=fn>bool <a name="leapYear"></a>TQDate::leapYear ( int y )<tt> [static]</tt>
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</h3>
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Returns TRUE if the specified year <em>y</em> is a leap year; otherwise
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returns FALSE.
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<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="longDayName"></a>TQDate::longDayName ( int weekday )<tt> [static]</tt>
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</h3>
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Returns the long name of the <em>weekday</em>.
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<p> 1 = "Monday", 2 = "Tuesday", ... 7 = "Sunday"
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<p> The day names will be localized according to the system's locale
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settings.
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<p> <p>See also <a href="#toString">toString</a>(), <a href="#shortDayName">shortDayName</a>(), <a href="#shortMonthName">shortMonthName</a>(), and <a href="#longMonthName">longMonthName</a>().
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<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="longMonthName"></a>TQDate::longMonthName ( int month )<tt> [static]</tt>
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</h3>
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Returns the long name of the <em>month</em>.
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<p> 1 = "January", 2 = "February", ... 12 = "December"
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<p> The month names will be localized according to the system's locale
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settings.
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<p> <p>See also <a href="#toString">toString</a>(), <a href="#shortMonthName">shortMonthName</a>(), <a href="#shortDayName">shortDayName</a>(), and <a href="#longDayName">longDayName</a>().
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<h3 class=fn>int <a name="month"></a>TQDate::month () const
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</h3>
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Returns the month (January=1..December=12) of this date.
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<p> <p>See also <a href="#year">year</a>() and <a href="#day">day</a>().
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<p>Example: <a href="dclock-example.html#x1100">dclock/dclock.cpp</a>.
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<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="monthName"></a>TQDate::monthName ( int month )<tt> [static]</tt>
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> Use <a href="#shortMonthName">shortMonthName</a>() instead.
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<h3 class=fn>bool <a name="operator!-eq"></a>TQDate::operator!= ( const <a href="qdate.html">TQDate</a> & d ) const
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</h3>
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<p> Returns TRUE if this date is different from <em>d</em>; otherwise returns FALSE.
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<h3 class=fn>bool <a name="operator-lt"></a>TQDate::operator< ( const <a href="qdate.html">TQDate</a> & d ) const
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</h3>
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<p> Returns TRUE if this date is earlier than <em>d</em>, otherwise returns FALSE.
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|
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<h3 class=fn>bool <a name="operator-lt-eq"></a>TQDate::operator<= ( const <a href="qdate.html">TQDate</a> & d ) const
|
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</h3>
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|
|
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<p> Returns TRUE if this date is earlier than or equal to <em>d</em>,
|
|
otherwise returns FALSE.
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|
|
|
<h3 class=fn>bool <a name="operator-eq-eq"></a>TQDate::operator== ( const <a href="qdate.html">TQDate</a> & d ) const
|
|
</h3>
|
|
|
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<p> Returns TRUE if this date is equal to <em>d</em>; otherwise returns FALSE.
|
|
|
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<h3 class=fn>bool <a name="operator-gt"></a>TQDate::operator> ( const <a href="qdate.html">TQDate</a> & d ) const
|
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</h3>
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|
|
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<p> Returns TRUE if this date is later than <em>d</em>, otherwise returns FALSE.
|
|
|
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<h3 class=fn>bool <a name="operator-gt-eq"></a>TQDate::operator>= ( const <a href="qdate.html">TQDate</a> & d ) const
|
|
</h3>
|
|
|
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<p> Returns TRUE if this date is later than or equal to <em>d</em>,
|
|
otherwise returns FALSE.
|
|
|
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<h3 class=fn>bool <a name="setYMD"></a>TQDate::setYMD ( int y, int m, int d )
|
|
</h3>
|
|
Sets the date's year <em>y</em>, month <em>m</em> and day <em>d</em>.
|
|
<p> <em>y</em> must be in the range 1752..8000, <em>m</em> must be in the range
|
|
1..12, and <em>d</em> must be in the range 1..31.
|
|
<p> <b>Warning:</b> If <em>y</em> is in the range 0..99, it is interpreted as
|
|
1900..1999.
|
|
<p> Returns TRUE if the date is valid; otherwise returns FALSE.
|
|
|
|
<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="shortDayName"></a>TQDate::shortDayName ( int weekday )<tt> [static]</tt>
|
|
</h3>
|
|
Returns the name of the <em>weekday</em>.
|
|
<p> 1 = "Mon", 2 = "Tue", ... 7 = "Sun"
|
|
<p> The day names will be localized according to the system's locale
|
|
settings.
|
|
<p> <p>See also <a href="#toString">toString</a>(), <a href="#shortMonthName">shortMonthName</a>(), <a href="#longMonthName">longMonthName</a>(), and <a href="#longDayName">longDayName</a>().
|
|
|
|
<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="shortMonthName"></a>TQDate::shortMonthName ( int month )<tt> [static]</tt>
|
|
</h3>
|
|
Returns the name of the <em>month</em>.
|
|
<p> 1 = "Jan", 2 = "Feb", ... 12 = "Dec"
|
|
<p> The month names will be localized according to the system's locale
|
|
settings.
|
|
<p> <p>See also <a href="#toString">toString</a>(), <a href="#longMonthName">longMonthName</a>(), <a href="#shortDayName">shortDayName</a>(), and <a href="#longDayName">longDayName</a>().
|
|
|
|
<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="toString"></a>TQDate::toString ( const <a href="ntqstring.html">TQString</a> & format ) const
|
|
</h3>
|
|
Returns the date as a string. The <em>format</em> parameter determines
|
|
the format of the result string.
|
|
<p> These expressions may be used:
|
|
<p> <center><table cellpadding="4" cellspacing="2" border="0">
|
|
<tr bgcolor="#a2c511"> <th valign="top">Expression <th valign="top">Output
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">d <td valign="top">the day as number without a leading zero (1-31)
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">dd <td valign="top">the day as number with a leading zero (01-31)
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">ddd
|
|
<td valign="top">the abbreviated localized day name (e.g. 'Mon'..'Sun').
|
|
Uses <a href="#shortDayName">TQDate::shortDayName</a>().
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">dddd
|
|
<td valign="top">the long localized day name (e.g. 'Monday'..'Sunday').
|
|
Uses <a href="#longDayName">TQDate::longDayName</a>().
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">M <td valign="top">the month as number without a leading zero (1-12)
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">MM <td valign="top">the month as number with a leading zero (01-12)
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">MMM
|
|
<td valign="top">the abbreviated localized month name (e.g. 'Jan'..'Dec').
|
|
Uses <a href="#shortMonthName">TQDate::shortMonthName</a>().
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">MMMM
|
|
<td valign="top">the long localized month name (e.g. 'January'..'December').
|
|
Uses <a href="#longMonthName">TQDate::longMonthName</a>().
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">yy <td valign="top">the year as two digit number (00-99)
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">yyyy <td valign="top">the year as four digit number (1752-8000)
|
|
</table></center>
|
|
<p> All other input characters will be ignored.
|
|
<p> Example format strings (assuming that the TQDate is the
|
|
20<sup><small>th</small></sup> July 1969):
|
|
<center><table cellpadding="4" cellspacing="2" border="0">
|
|
<tr bgcolor="#a2c511"> <th valign="top">Format <th valign="top">Result
|
|
<tr bgcolor="#f0f0f0"> <td valign="top">dd.MM.yyyy <td valign="top" colspan="1" rowspan="1"> 20.07.1969
|
|
<tr bgcolor="#d0d0d0"> <td valign="top">ddd MMMM d yy <td valign="top" colspan="1" rowspan="1"> Sun July 20 69
|
|
</table></center>
|
|
<p> If the date is an invalid date, then <a href="ntqstring.html#TQString-null">TQString::null</a> will be returned.
|
|
<p> <p>See also <a href="ntqdatetime.html#toString">TQDateTime::toString</a>() and <a href="qtime.html#toString">TQTime::toString</a>().
|
|
|
|
<p>
|
|
<h3 class=fn><a href="ntqstring.html">TQString</a> <a name="toString-2"></a>TQDate::toString ( <a href="ntqt.html#DateFormat-enum">TQt::DateFormat</a> f = TQt::TextDate ) const
|
|
</h3>
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
<p> Returns the date as a string. The <em>f</em> parameter determines the
|
|
format of the string.
|
|
<p> If <em>f</em> is <a href="ntqt.html#DateFormat-enum">TQt::TextDate</a>, the string format is "Sat May 20 1995"
|
|
(using the <a href="#shortDayName">shortDayName</a>() and <a href="#shortMonthName">shortMonthName</a>() functions to
|
|
generate the string, so the day and month names are locale
|
|
specific).
|
|
<p> If <em>f</em> is <a href="ntqt.html#DateFormat-enum">TQt::ISODate</a>, the string format corresponds to the
|
|
ISO 8601 specification for representations of dates, which is
|
|
YYYY-MM-DD where YYYY is the year, MM is the month of the year
|
|
(between 01 and 12), and DD is the day of the month between 01 and
|
|
31.
|
|
<p> If <em>f</em> is <a href="ntqt.html#DateFormat-enum">TQt::LocalDate</a>, the string format depends on the
|
|
locale settings of the system.
|
|
<p> If the date is an invalid date, then <a href="ntqstring.html#TQString-null">TQString::null</a> will be returned.
|
|
<p> <p>See also <a href="#shortDayName">shortDayName</a>() and <a href="#shortMonthName">shortMonthName</a>().
|
|
|
|
<h3 class=fn>int <a name="weekNumber"></a>TQDate::weekNumber ( int * yearNumber = 0 ) const
|
|
</h3>
|
|
Returns the week number (1 to 53), and stores the year in <em>*yearNumber</em> unless <em>yearNumber</em> is null (the default).
|
|
<p> Returns 0 if the date is invalid.
|
|
<p> In accordance with ISO 8601, weeks start on Monday and the first
|
|
Thursday of a year is always in week 1 of that year. Most years
|
|
have 52 weeks, but some have 53.
|
|
<p> <em>*yearNumber</em> is not always the same as <a href="#year">year</a>(). For example, 1
|
|
January 2000 has week number 52 in the year 1999, and 31 December
|
|
2002 has week number 1 in the year 2003.
|
|
<p>
|
|
<p> Copyright (c) 1989 The Regents of the University of California.
|
|
All rights reserved.
|
|
<p> Redistribution and use in source and binary forms are permitted
|
|
provided that the above copyright notice and this paragraph are
|
|
duplicated in all such forms and that any documentation,
|
|
advertising materials, and other materials related to such
|
|
distribution and use acknowledge that the software was developed
|
|
by the University of California, Berkeley. The name of the
|
|
University may not be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
|
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
<p> <p>See also <a href="#isValid">isValid</a>().
|
|
|
|
<h3 class=fn>int <a name="year"></a>TQDate::year () const
|
|
</h3>
|
|
Returns the year (1752..8000) of this date.
|
|
<p> <p>See also <a href="#month">month</a>() and <a href="#day">day</a>().
|
|
|
|
<hr><h2>Related Functions</h2>
|
|
<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="operator-lt-lt"></a>operator<< ( <a href="ntqdatastream.html">TQDataStream</a> & s, const <a href="qdate.html">TQDate</a> & d )
|
|
</h3>
|
|
|
|
<p> Writes the date, <em>d</em>, to the data stream, <em>s</em>.
|
|
<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
|
|
|
|
<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="operator-gt-gt"></a>operator>> ( <a href="ntqdatastream.html">TQDataStream</a> & s, <a href="qdate.html">TQDate</a> & d )
|
|
</h3>
|
|
|
|
<p> Reads a date from the stream <em>s</em> into <em>d</em>.
|
|
<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
|
|
|
|
<!-- eof -->
|
|
<hr><p>
|
|
This file is part of the <a href="index.html">TQt toolkit</a>.
|
|
Copyright © 1995-2007
|
|
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
|
<table width=100% cellspacing=0 border=0><tr>
|
|
<td>Copyright © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
|
|
</html>
|